Roll for conveyor

Abstract

A roll belt conveyor having a shaft that supports, adjacent to both ends, the inner ring of a rolling bearing whose outer ring carries a cylindrical tube encompassing the shaft, there being provided a seal on the outside of each rolling bearing, the roll comprising a ring-shaped bearing housing that presents an external peripheral surface, encasable through elastic deformation, into a superficial internal recess of the cylindrical tube, so as to lock, radially and axially to this the ring-shaped bearing housing, and retaining the adjacent rolling bearing against radial and axial displacements, at least in the inward direction of the roll.

What is claimed is:  
     
       1. A roll for a conveyor comprising a shaft supporting, adjacent to each end and locking against axial displacements in the direction of the latter, an internal ring of a rolling bearing, whose outer ring carries a cylindrical tube disposed encompassing the shaft, characterized by: a ring-shaped bearing housing that presents a peripheral external surface that is encasable, by means of elastic deformation, into a single superficial internal recess of the cylindrical tube, thus locking radially and axially to the cylindrical tube the ring-shaped bearing housing and an internal peripheral surface against which is seated and retained, against radial and axial displacements, at least in inward direction of the roll, the outer ring, of the adjacent rolling bearing. 
     
     
       2. The roll of claim  1 , wherein the internal superficial recess is a circumferential groove. 
     
     
       3. The roll of claim  2 , wherein the ring-shaped bearing housing is provided with a circumferential recess defining, with a posterior face of the adjacent rolling bearing, a lodging for retaining lubricant. 
     
     
       4. The roll of claim  3 , wherein the circumferential recess is provided in the middle of an anterior face of an incorporated annular rim and projecting radially into an inner part of the ring-shaped bearing housing. 
     
     
       5. The roll of claim  4 , wherein the annular rim is radially distant from the shaft, seated against posterior faces of the outer and inner rings of the adjacent rolling bearing. 
     
     
       6. The roll of claim  1 , and further comprising a seal provided externally to each rolling bearing, fixed to the ring-shaped bearing housing and slidingly seated on at least one of the parts defined by an anterior face of the inner ring of the rolling bearing and an end cover. 
     
     
       7. The roll of claim  6 , wherein the ring-shaped bearing housing and the end cover are made of plastic material. 
     
     
       8. A roll for a conveyor comprising a shaft supporting, adjacent to each end and locking against axial displacements in the direction of the latter, an internal ring of a rolling bearing whose outer ring carries a cylindrical tube disposed encompassing the shaft, characterized by: a ring-shaped bearing housing that presents a peripheral external surface that is encasable, by means of elastic deformation, into a superficial internal recess of the cylindrical tube, thus locking radially and axially to the cylindrical tube the ring-shaped bearing housing and an internal peripheral surface against which is seated and retained, against radial and axial displacements, at least in inward direction of the roll, the outer ring, of the adjacent rolling bearing, and further comprising an end cover incorporating at least one circumferential internal protuberance, encasable by means of elastic deformation, into one superficial external recess of the shaft, thus locking radially and axially to the end cover, the cover carrying one portion of a posterior wall seated against an anterior face of the inner ring of the adjacent rolling bearing, locking the bearing against axial displacements towards the adjacent end of the shaft. 
     
     
       9. A roll for a conveyor comprising a shaft supporting, adjacent to each end and locking against axial displacements in the direction of the latter, an internal ring of a rolling bearing whose outer ring carries a cylindrical tube disposed encompassing the shaft, characterized by: a ring-shaped bearing housing that presents a peripheral external surface that is encasable, by means of elastic deformation, into a superficial internal recess of the cylindrical tube, thus locking radially and axially to the cylindrical tube the ring-shaped bearing, housing and an internal peripheral surface against which is seated and retained, against radial and axial displacements, at least in inward direction of the roll, the outer ring, of the adjacent rolling bearing, and further comprising a seal provided externally to each rolling bearing, fixed to the ring-shaped bearing housing and slidingly seated on at least one of the parts defined by an anterior face of the inner ring of the rolling bearing and an end cover wherein the ring-shaped bearing housing and the end cover are made of plastic material and wherein the end cover comprises a cylindrical hub that includes an internal circumferential protuberance and an annular flange. 
     
     
       10. The roll of claim  9 , wherein the internal circumferential protuberance is in the form of a continuous circumferential projection. 
     
     
       11. The roll of claim  9 , wherein an external superficial recess presents the form of a retaining groove disposed about the shaft so as to receive the internal circumferential protuberance. 
     
     
       12. The roll of claim  9 , wherein the cylindrical hub carries a portion of a posterior wall of the end cover so as to prevent axial and radial movement of the rolling bearing. 
     
     
       13. The roll of claim  12 , wherein the seal presents two internal circumferential projections, parallel and aligned between themselves, one of which seats on the portion of the posterior wall of the end cover, and the other on the anterior face of the inner ring of the adjacent rolling bearing. 
     
     
       14. The roll of claim  9 , wherein the end cover comprises an anterior tubular axial extension incorporated to the cylindrical hub, involving the adjacent end of the shaft. 
     
     
       15. The roll of claim  9 , wherein the seal is an annular body that incorporates, on its peripheral internal surface, at least two internal circumferential lips, elastically deformable through contact with one of the parts of the anterior face of the inner ring of the adjacent rolling bearing and with the end cover, and on one peripheral external surface, one circumferential lip encasable in a circumferential recess of the internal peripheral surface of the ring-shaped bearing housing, thus allowing the locking of the seal against axial and circumferential displacements in relation to the ring-shaped bearing housing. 
     
     
       16. The roll of claim  9 , wherein the seal is of the labyrinth type having one anterior face furnished with alternating circumferential projections. 
     
     
       17. The roll of claim  16 , wherein the posterior face of the annular flange of the extreme end cover embodies axial circumferential projections, encasable between the circumferential axial projections of the seal. 
     
     
       18. A roll for a conveyor comprising: 
       a shaft having two ends;  
       a bearing having an internal ring and an outer ring, the internal ring supported and locked against axial displacement by the shaft;  
       a cylindrical tube disposed encompassing the shaft and supported by the outer ring of the bearing;  
       a ring-shaped bearing housing disposed longitudinally inward from an adjacent peripheral edge of the cylindrical tube, and presenting a peripheral external surface and an internal peripheral surface, wherein substantially all of the peripheral external surface is encasable into a superficial internal recess of the cylindrical tube, locking the ring-shaped bearing housing radially and axially to the cylindrical tube, and wherein the internal peripheral surface is seated and retained against the outer ring of the adjacent bearing so as to lock radially and axially the bearing in relation to the roll.  
     
     
       19. The roll of claim  18  and further comprising: 
       an outer conical portion of the cylindrical tube disposed between the adjacent peripheral edge of the cylindrical tube and the superficial internal recess, wherein the outer conical portion guides the ring-shaped bearing housing into the superficial internal recess during assembly of the roll.